Design and performance of a large-area scintillator-based chamber for the MID subsystem of ALICE 3
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| Autores principales: | , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866914563593601024 |
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| author | Molina, Ruben Alfaro Noris, Juan Carlos Cabanillas Solis, Edmundo García Trueba, Laura Helena González Grabski, Varlen Corral, Gerardo Herrera Méndez, Jesús Eduardo Muñoz Monzón, Ildefonso León Ortiz, Antonio Paz, Antonio García, Ian Pérez Pineda, Ricardo Rodríguez Torres, Solangel Rojas Muñoz, Guillermo Tejeda Torres, Paola Vargas Campos, Victor Vázquez Beltran, Yael Antonio Vásquez |
| author_facet | Molina, Ruben Alfaro Noris, Juan Carlos Cabanillas Solis, Edmundo García Trueba, Laura Helena González Grabski, Varlen Corral, Gerardo Herrera Méndez, Jesús Eduardo Muñoz Monzón, Ildefonso León Ortiz, Antonio Paz, Antonio García, Ian Pérez Pineda, Ricardo Rodríguez Torres, Solangel Rojas Muñoz, Guillermo Tejeda Torres, Paola Vargas Campos, Victor Vázquez Beltran, Yael Antonio Vásquez |
| contents | This paper reports on the design and construction of a chamber for the muon identifier detector (MID) of the ALICE 3 upgrade project. The chamber consists of two sensitive layers separated by a 1 cm air gap. Each layer holds 24 scintillator bars ($1\times4\times100$ cm$^3$) manufactured by FNAL-NICADD. The bars are equipped with Kuraray wavelength shifting fibers and the readout is provided by a silicon photomultiplier from Hamamatsu. The bars in the second layer are orthogonal to the bars in the first layer, thus providing an overlapping cell size of 4$\times$4 cm$^{2}$. The bar assembly as well as the design of the mechanical structure is described. The design of the chamber is close to that considered in the ALICE 3 letter of intent. The chamber was tested at the CERN T10 beamline using 3 GeV/$c$ pion-enriched and muon beams. The chamber was placed behind an iron absorber, with different absorber lengths considered in the test. The muon identification is performed using a Machine Learning algorithm, which was trained and tested using muon (signal) and pion (background) data (50% of the available statistics). The trained ML algorithm was applied to muon data, yielding a muon efficiency above 99% for the OR condition (detection in either layer 1 or 2). The implementation in the pion-beam data gives the fake-muon efficiency as a function of the absorber length that is well described by an exponential function with a slope parameter of 18.79 cm. The next steps towards finalizing the optimization are outlined. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_00176 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Design and performance of a large-area scintillator-based chamber for the MID subsystem of ALICE 3 Molina, Ruben Alfaro Noris, Juan Carlos Cabanillas Solis, Edmundo García Trueba, Laura Helena González Grabski, Varlen Corral, Gerardo Herrera Méndez, Jesús Eduardo Muñoz Monzón, Ildefonso León Ortiz, Antonio Paz, Antonio García, Ian Pérez Pineda, Ricardo Rodríguez Torres, Solangel Rojas Muñoz, Guillermo Tejeda Torres, Paola Vargas Campos, Victor Vázquez Beltran, Yael Antonio Vásquez Instrumentation and Detectors High Energy Physics - Experiment This paper reports on the design and construction of a chamber for the muon identifier detector (MID) of the ALICE 3 upgrade project. The chamber consists of two sensitive layers separated by a 1 cm air gap. Each layer holds 24 scintillator bars ($1\times4\times100$ cm$^3$) manufactured by FNAL-NICADD. The bars are equipped with Kuraray wavelength shifting fibers and the readout is provided by a silicon photomultiplier from Hamamatsu. The bars in the second layer are orthogonal to the bars in the first layer, thus providing an overlapping cell size of 4$\times$4 cm$^{2}$. The bar assembly as well as the design of the mechanical structure is described. The design of the chamber is close to that considered in the ALICE 3 letter of intent. The chamber was tested at the CERN T10 beamline using 3 GeV/$c$ pion-enriched and muon beams. The chamber was placed behind an iron absorber, with different absorber lengths considered in the test. The muon identification is performed using a Machine Learning algorithm, which was trained and tested using muon (signal) and pion (background) data (50% of the available statistics). The trained ML algorithm was applied to muon data, yielding a muon efficiency above 99% for the OR condition (detection in either layer 1 or 2). The implementation in the pion-beam data gives the fake-muon efficiency as a function of the absorber length that is well described by an exponential function with a slope parameter of 18.79 cm. The next steps towards finalizing the optimization are outlined. |
| title | Design and performance of a large-area scintillator-based chamber for the MID subsystem of ALICE 3 |
| topic | Instrumentation and Detectors High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2604.00176 |